Help with tunes for older cars

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1

Hey all, any help would be appreciated. I am having trouble tuning older vehicles for handling. My Nissan Datsun 510, VW Beetle and Merc SLR300 all have the same issue, which is a steering ‘drift’ when in a straight line, the cars drift or wobble off line, and a slight steering adjustment send the drift/wobble the other way. I have tried various adjustments but only seem to make it degrees worse or better without eliminating it. I use the same set up basically that I use on all my C class tunes, to reduce understeer and have a good handling and high acceleration vehicle:

Sport gears, Race shocks negative camber front and back (-0.7/-0.5 or less), Negative front toe positive back (-2.0/+1.0), high steering rack angle (5.7 to 6) high damping (9.5/9.6) low rebound (1.5/1.6), stiff front and rear springs, front less so than back, and same with stabilisers.

This method works really well with all my other tunes generally, and is a good ‘default’ starting point, but not with the older cars, can’t work out where I’m going wrong …

2

If those toe numbers are right then yeah I’m surprised you can keep it on the road. Set them both to zero and leave them there.

3

Raise the ride height until it stops.

4

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Raise the ride height until it stops.

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I’ll try that for sure, thanks.

5

Get rid of the toe like Foot said. Those numbers are just plain silly and are never going to end well.

6

Thanks BIGPoppaKEGDog, it was the ride height, and now my 510 is handling like it’s on rails. LOL though, I meant 0.1/0.2 not 1.0/2.0 for the toe, so to the other guys, although I do appreciate your thoughts and suggestions, the toe setup can add that little something extra to a tune - there is nothing wrong with a very (and I mean VERY) small toe adjustment ± 0.1 or 0.2 depending on the car and suspension setup and the track. Thanks again, and happy days, as I love racing the older models! Out of interest, I also softened the anti-roll and springs, which in combination with the other settings worked wonders. Cheers everyone, and again, a bit of a quiet chuckle at my typo! : )